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Python - Parse strings with variable repeating substring


Python - Parse strings with variable repeating substring

By : Arnaud Waechter
Date : November 22 2020, 01:01 AM
This might help you I am trying to do something which I thought would be simple (and probably is), however I am hitting a wall. I have a string that contains document numbers. In most cases the format is ######-#-### however in some cases, where the single digit should be, there are multiple single digits separated by a comma (i.e. ######-#,#,#-###). The number of single digits separated by a comma is variable. Below is an example: , Perhaps something like this:
code :
>>> import re
>>> s = '030421-1,2-001 & 030421-1-002,030421-1,2,3-002, 030421-1-003'
>>> it = re.finditer(r'(\b\d{6}-)(\d(?:,\d)*)(-\d{3})\b', s)
>>> for m in it:
    a, b, c = m.groups()
    for x in b.split(','):
        print a + x + c
...         
030421-1-001
030421-2-001
030421-1-002
030421-1-002
030421-2-002
030421-3-002
030421-1-003
>>> [a+x+c for a, b, c in (m.groups() for m in it) for x in b.split(',')]
['030421-1-001', '030421-2-001', '030421-1-002', '030421-1-002', '030421-2-002', '030421-3-002', '030421-1-003']


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how to parse multiple strings into a string variable using a loop python

how to parse multiple strings into a string variable using a loop python


By : user7522474
Date : March 29 2020, 07:55 AM
wish of those help The problem is that you are building up the format string in the loop, which gives something with the same variable several times:
code :
'''
 %(number)s
 %(number)s
'''
for i in range(0,4):
  number = str(2456*i)
  content = content + '''
  %(number)s''' % {'number': number}
for i in range(0,4):
    content += '\n %d' % (2456*i)
How to parse python functions from strings, with any input variable name?

How to parse python functions from strings, with any input variable name?


By : Dinesh
Date : March 29 2020, 07:55 AM
To fix this issue Use the lambdify module from Sympy, full docs here
The package has several possible ways of addressing this problem, since it support full symbolic computation at a powerful level (e.g., 1, 2, 3)
code :
from sympy import sympify
f = sympify('x**2 + y**2')
f.subs({'x':1, 'y':2})
Longest substring without repeating characters in python

Longest substring without repeating characters in python


By : Ekrem Sever
Date : March 29 2020, 07:55 AM
hope this fix your issue This post is pretty old, but I think my solution fixes the bug in the original code.
code :
def lengthOfLongestSubstring(s):
    checklist = {}
    starting_index_of_current_substring = 0
    length_of_longest_substring = 0
    for i, v in enumerate(s):
        if v in checklist:
          if checklist[v] >= starting_index_of_current_substring:
                        starting_index_of_current_substring = checklist[v] + 1

        length_of_current_substring = i - starting_index_of_current_substring + 1
        length_of_longest_substring = max(length_of_current_substring, length_of_longest_substring)
                checklist[v] = i
     return length_of_longest_substring
IOS Parse How to search an array of strings for a substring?

IOS Parse How to search an array of strings for a substring?


By : Mjhc0922
Date : March 29 2020, 07:55 AM
Hope that helps You can use NSPredicate for this purpose. The following is an example.
In mysql, substring query not working properly if strings are repeating

In mysql, substring query not working properly if strings are repeating


By : Steven Gu
Date : March 29 2020, 07:55 AM
help you fix your problem i want to replace last 5 digits of a phone number. i wrote this query : , Why are you using replace()?
code :
update users
    set mobile = concat(left(model, length(mobile) - 5), 'xxxxx')
    where email = 'xxxxx@gmail.com';
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